Bollettino valanghe

Banff Yoho Kootenay

Dec 28 – 29, 2014Parks Canada
Vedi sulla mappa
Archiviato · scaduto 12 years ago

Pericolo valanghe

Sun
Mon
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Better skiing can be found due to the recent, however there is a poor bond at the storm snow interface and the overall snowpack is quite weak. Avoid larger features in steeper terrain. SH

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3
    15 to 30cm's of snow from last week is bonding poorly to previous surfaces and remains reactive to skier triggering, especially in areas where there is some wind loading and slab development. This is more of a problem in the western areas of the park

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–3
    A weak and facetted basal layer exists at the bottom of the snowpack. Smaller storm snow avalanches may step down to this weak layer.

Snowpack Summary

Recent winds have created small wind slabs in the alpine which sit over the Dec 18 layer of crust, facets and/or surface hoar depending on the location. A poor bond exists at this interface. At the base of the snowpack weak crusts and facets exist which are still a concern.

Weather Forecast

A gradual cooling trend over the next few days with temperatures reaching the-20's by Monday. Expect only trace amounts of snow. Light alpine winds from the East/NE through the forecast period.

Avalanche Summary

Following the storm last week avalanches up to size 2.5 were observed with propagations up to 200 m, occasionally stepping down to the basal facets/crusts.There was significantly less avalanche activity around the Banff area. The Lake Louise region and West received the bulk of the snow with a subsequent increase in activity.

Confidence

Due to the number and quality of field observations on Saturday

Regioni coperte